Intelligent Color Modification and Setting Production Line Upgrade Case of a Guangdong Factory
Customer Background
With 9 years of focus on leather finishing, the enterprise covers an area of 11,000 square meters and operates 2 semi-automated finishing production lines. Its core business includes color modification, setting, and hand feel optimization of PU/PVC synthetic leather and recycled leather, with an annual processing capacity of approximately 5 million meters. It mainly provides supporting processing services for shoe enterprises and home furnishing manufacturers in the Pearl River Delta region, achieving an annual sales volume of 85 million RMB. In recent years, downstream brand customers have continuously raised requirements for leather color consistency, setting stability (folding resistance, temperature resistance), and hand feel fineness. However, the original finishing mode relying on manual operation can no longer meet the quality standards of high-end orders, making it urgent to upgrade automated technology to break through quality bottlenecks.
Project Overview
A leather processing factory in Guangdong has long been plagued by three core pain points: “uneven color modification, poor setting effect, and low batch consistency.” Combining the characteristics of leather finishing processes, Haifeng Automation has tailored a full-chain transformation solution integrating “equipment upgrade + process digitalization + intelligent control.” By introducing integrated equipment for precise color modification and intelligent setting, and optimizing dye proportioning and temperature control logic, the upgrade of 2 finishing production lines was completed in just 4 months. This helped the enterprise transform from “manual experience-based processing” to “data-driven precise processing,” successfully solving the quality challenges in mid-to-high-end leather finishing and opening up supporting markets for branded shoe materials and high-end home customization.
Core Customer Pain Points
01
Unstable color modification quality
Manual paint mixing errors exceed 10%, leading to obvious color deviations in the same batch of leather (ΔE value ≥ 3), which fails to meet the brand customer standard of ΔE ≤ 1.5. Uneven dye penetration causes color differences and blooming on the surface, with a finished product unqualified rate of 11% and annual rework losses exceeding 750,000 RMB.
02
Poor setting effect with easy rebound
Manual control of oven temperature (error ±5℃) results in leather folding resistance of only 15,000 times after setting, lower than the high-end market standard of 25,000 times. Deformation and wrinkling are prone to occur after storage for 1-2 months, with a customer complaint rate of 12%. Two brand customers have thus reduced cooperative orders.
03
Low production efficiency
Each production line requires 8 workers responsible for paint mixing, feeding, temperature control, and inspection. The processing speed for a single batch of color modification + setting is only 8m/min, with a daily processing capacity of 12,000 meters per line and a total annual capacity of 5 million meters for 2 lines, making it difficult to undertake large-value high-end processing orders.
04
High comprehensive costs
The dye waste rate reaches 15%. Based on an annual consumption of 300 tons of special dyes at a unit price of 22,000 RMB/ton, the annual wasted dye cost exceeds 990,000 RMB. The annual labor cost per line is over 600,000 RMB, totaling 1.2 million RMB for 2 lines. The old oven equipment consumes high energy, with a daily power consumption of 320 kWh per line, resulting in serious energy waste.
Haifeng's Solutions
01
Core equipment upgrade
Replace traditional manual paint mixing equipment and ordinary ovens with 2 sets of Haifeng HF-HZ300 intelligent integrated production lines for leather color modification and setting. Equipped with an automatic dye proportioning system with an accuracy of ±0.1% and a high-speed dispersion mixing device (rotating speed 6500±200 rpm), it achieves precise dye proportioning and uniform mixing. Configure an intelligent temperature-controlled oven (temperature error ±0.5℃) combined with a segmented hot air circulation system to ensure uniform heating of leather.
02
Implementation of intelligent control
Equip with a PLC intelligent control system, pre-storing formula databases for more than 40 mainstream colors and material setting parameters (including temperature, time, and pressure combinations), realizing full-process automation of paint mixing, coloring, setting, and cooling. Add an online color difference detection module to real-time monitor the ΔE value of leather color, automatically issue an early warning and adjust dye proportioning when exceeding the standard, ensuring batch consistency.
03
Process optimization and upgrading
Optimize the dye penetration process, improve dye penetration depth through pre-wetting treatment + gradient coloring mode. Customize setting curves (three stages of heating – constant temperature – cooling), adjust parameters according to leather material characteristics to enhance setting stability. Configure a dye recovery device to reduce waste and environmental pressure.
04
Full-cycle support services
Arrange 2 professional engineers to be stationed at the factory for 4 days to complete equipment installation, commissioning, and old equipment removal. Conduct a 2-day practical training covering core skills such as formula calling, parameter adjustment, equipment maintenance, and color difference calibration. Provide a 1-year whole-machine warranty, establish a 24-hour technical docking mechanism, and conduct comprehensive on-site equipment maintenance every quarter.
Core Achievements of Project Implementation
Dual Qualification of Color Modification and Setting Quality, Significant Improvement in Customer Trust
With the support of Haifeng’s intelligent equipment and precise processes, the dye proportioning error can be stably controlled within ±0.1%, and the color ΔE value of the same batch of leather does not exceed 1.2, fully meeting the strict standards of brand customers. The setting temperature is precisely controlled, and the leather folding resistance has directly reached 30,000 times. Even after 6 months of storage, there is no deformation or wrinkling. The finished product unqualified rate has dropped from 11% to 2.8%, saving more than 650,000 RMB in annual rework losses.
With this stable quality assurance, the enterprise has successfully passed the supplier qualification review of 3 domestic first-tier shoe material brands. It has not only strengthened the cooperative relationship with original core customers but also secured long-term processing orders from 2 high-end home furnishing brands. Through word-of-mouth among customers, its reputation has become increasingly solid.
Doubled Production Efficiency, Remarkable Enhancement in Large-Value Order Undertaking Capacity
The full-process automated transformation combined with process optimization has achieved immediate results – the processing speed of color modification + setting has increased from 8m/min to 18m/min. A single line can process 27,000 meters per day, more than doubling the previous 12,000 meters. The total annual capacity of the two lines has exceeded 9.8 million meters, a 96% increase compared with before the transformation.
Now the enterprise no longer has to focus on small scattered orders and is fully capable of undertaking large-value high-end orders. It has successfully signed 2 high-end home furnishing leather processing orders totaling 2 million meters, with a single order value exceeding 4 million RMB, completely breaking free from the constraint of “only being able to handle small orders.”
Significant Reduction in Comprehensive Costs, Continuous Expansion of Profit Margin
The combination of the dye recovery device and the precise proportioning system has reduced the dye waste rate from 15% to 6%, saving more than 594,000 RMB in annual dye costs. The automated equipment has saved a lot of labor – the number of operators per line has been reduced from 8 to 3, saving 900,000 RMB in annual labor costs for the two lines. The intelligent oven is also very energy-efficient, with daily power consumption reduced from 320 kWh to 224 kWh, saving more than 67,000 RMB in annual electricity fees.
Adding these three items together, the enterprise’s annual comprehensive costs have been reduced by 1.5615 million RMB, and the investment can be recovered in 3.6 years. Coupled with the increasing proportion of high-end orders, the profit margin is continuously expanding.
Upgraded Order Response Capacity, Comprehensive Enhancement of Market Competitiveness
Formulas can be called with one click and parameters can be adjusted automatically. It supports quick switching between more than 100 mainstream color numbers and different materials (synthetic leather, recycled leather), reducing the order change time from 1.5 hours to 25 minutes and greatly improving efficiency. Online color difference detection can achieve “inspection while production” without the need for manual re-inspection. The order delivery cycle has been shortened from 7 days to 4 days, and customer satisfaction has been significantly improved.
Now the proportion of high-end orders of the enterprise has increased from 12% before the transformation to 35%, and the annual sales volume has risen from 85 million RMB to 150 million RMB. It has firmly established itself as a benchmark enterprise in the leather finishing field in the Pearl River Delta region, with its market competitiveness greatly enhanced.
